create a vector to store more then one username and

[adolsun]

just want to know how to create a vector to store more then one username and
password, which i can call up each time when my program is executed.

username1:admin
password: 111
username2: user
password: 222

Thanks

This is my code:
-------------------------------------------------------

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class login extends JFrame
{public static void main(String[] args)
{login login=new login();
login.show();
}
TextField text1,text2,text3,text4;
JButton b1,b2;
boolean confirm=false;

public login()
{setSize(300,100);
Container windowPane=getContentPane();
windowPane.setLayout(new GridLayout(3,2));
text1=new TextField("username:");
text1.setEditable(false);
text2=new TextField(6);
text3=new TextField("password:");
text3.setEditable(false);
text4=new TextField(6);
text4.setEchoChar('*');
b1=new JButton("OK");
b2=new JButton("Quit");
windowPane.add(text1);
windowPane.add(text2);
windowPane.add(text3);
windowPane.add(text4);
windowPane.add(b1);
windowPane.add(b2);
b1.addActionListener(new ConfirmListener());
b2.addActionListener(new QuitListener());
}

private class ConfirmListener implements ActionListener
{public void actionPerformed(ActionEvent e)
{confirm=true;
}
}
private class QuitListener implements ActionListener
{public void actionPerformed(ActionEvent e)
{System.exit(0);
}
}
}

 

[sedj]

I would use an inner class to store the user data, and add that class to a Vector, maybe something like :

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class login extends JFrame
{public static void main(String[] args)
  {login login=new login();
   login.show();
  }
 Vector users = new Vector();
 TextField text1,text2,text3,text4;
 JButton b1,b2;
 boolean confirm=false;

 public login()
 {setSize(300,100);
  Container windowPane=getContentPane();
  windowPane.setLayout(new GridLayout(3,2));
  text1=new TextField("username:");
  text1.setEditable(false);
  text2=new TextField(6);
  text3=new TextField("password:");
  text3.setEditable(false);
  text4=new TextField(6);
  text4.setEchoChar('*');
  b1=new JButton("OK");
  b2=new JButton("Quit");
  windowPane.add(text1);
  windowPane.add(text2);
  windowPane.add(text3);
  windowPane.add(text4);
  windowPane.add(b1);
  windowPane.add(b2);
  b1.addActionListener(new ConfirmListener());
  b2.addActionListener(new QuitListener());
 }

  private class ConfirmListener implements ActionListener {
   public void actionPerformed(ActionEvent e) {
   	confirm=true;
   	User user = new User();
   	user.user = text1.getText();
   	user.password = text3.getText();
   	users.add(user);
    }
   }
  private class QuitListener implements ActionListener
   {public void actionPerformed(ActionEvent e)
     {System.exit(0);
     }
   }
   
   class User {
      String user = "";
      String password = "";
      
   }
}

 

[adolsun]

I gave it a try as it's but I received an error with this line:

Vector users = new Vector();

Thanks in advance

 

[sedj]

You must add import the Vector class :

import java.util.Vector;

 

[adolsun]

Yes, thanks, it's working. Please if you have time can you tell me where (or how) to add:
username1:admin
password: 111
username2: user
password: 222
username3: user
password: 333

and then the suitable next interface will be displayed:
adminMenu for Admin and userMenu for user.

Thanks

 

[sedj]

I'm not sure about what you are asking, but, if you want to get the data from the Vector, apply this code to your application :

for (int i = 0; i < users.size; i++) {
 User u = (User)users.get(i);
 String uName = u.user;
 String uPwd = u.password;
 System.err.println(uName +" " +uPwd);
}

 

[adolsun]

thanks sedj, I mean when you log in you must enter only one of the folllowing usernames and passwords in order to get to the next interface (menues):

username1:admin
password: 111
username2: user
password: 222
username3: user
password: 333

Thanks

 

[JavaDude32]

At creation time, fill the Vector with usernames and passwords. Then you want to check it against the Vector.

Vector a = new Vector();
User u = new User("admin","111");
a.add(u);

...

User b = new User();
b.setName(Text1.getText());
b.setPw(Text3.getText());
for(int k = 0; k < a.size(); a++) {
  if((User)a.getElementAt(k).equals(b)) {
    //Voila! We have a match!
  }
}

Overide the equals method in User.

 

[adolsun]

Thanks JavaDude32 that's what I want !

 

[hologram]

When you use a Map instead of a Vector, then you don't need to create a class "User". You can use the 'username' as the key and the 'password' as the value. You also don't need to code a loop to check/retrieve a password, you can just call "get(key)" or "containsKey(key)" ...